Internal-combustion engine.



e. SGHIMMING. INTERNAL COMBUSTION ENGINE.

. APPLICATION FILED NOV. 8, 1909.

Patented Aug. 30, 1910. I

Witnesses 4 I Jmwzl'wb v I Ge j 52114! 15' t 6 out e, y.

subject of the GE'OBG SOHIHHING, 0F BEBL GERMAN Y.

IN'IEB'NLIa-COMBUS'IION ENGINE.

Specification of Letters l'etent.

Patented Au 30, 1910.

Application filed Iovem'be: 8, 1-809. Serial Io. 626,7L7.

To all whom it may comma:

Be it known that I, Guono Sonratmme, German Emperor, residing at Berlin, in the Empire of Germany, have mvented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

' Internal combustion engines with istons workin in opposite directions are own, in whic the introduction of the combustible takes place at the inner deadpoint followed by the expansion of the lgnited combustible. In these internal combustion engines liquid combustibles are employed and the sprayed and i nited oil is injected between the pistons rom one point of the cylinder wall, so that the burning jet is conveyed against theop osite cylinder wall, there iverted to. both snl es and thrown back approximately to the place at which it is injected. This method can be carried out with liquid combustibles,

7 because, from the jet of fine'ly sprayed oil,

which is burning through the entlre mass of the jet, burning oil is separated immediately on the wall the jet impinges on and burned there by reason of the very high temperature of the impin jet, and thus no substantial after burning ""takes place (provided the oil be completely combustible without the compression space becoming heated.) In carrying out the same method in internal combustion engines, which are fed with gaseous fuel, very considerable disadvanta es result, because as soon as a gas flame is coo ed below the temperature of ignition, rapid reignition and complete combustion is extremely diflicu'lt, as is sulficiently well known with boiler furnaces. vIn the gas flame jet there is no rotec'tive covering formed over the cylinder walls, which, inthe case of oil injection, is formed by the very thin burning oil layer. More particularlyin the short time of the injection available ifor complete oombllSlil0I1,tll6Iei%:1ltl0Il-0f the portion of the gas .flame jet w ich has been cooled below the temperature of ignition, is also no longer possible. In the just mentioned injection of as an after burning therefore takes place uring the ex ansion and in some cases even during the ex aust.

Now internal combustion engines with one piston which are operated with oil injection are also known (Ze'e'tschm'ft des Vereim Deutscher I ngenieure, Vol. 51, Page 1111),

in which the introduction of the combustible takes place from the inner deadpoint, and in which the injected sprayed jets are conduct-- ed in such away a ainst one another, that they meet in the middle of the cylinder and the resultant flame is deflected firstly a inst the piston and secondly against the cy inder This last deflection is, however, very deleterious even for the combustion of 011 s ray.) The portion of the flame which is t rown against the piston is, as experience has shown, but little cooled,'so that in all machines, which work like the Diesel motor for instance, the oil jet is in'ected directly against the piston. On in the case of oil s ray, in which a perfectly complete mixture tween air and combustible may be produced within a very short time, the combustion is so impaired by the cylinder cover that it is necessary to coat the cover in the interior of the combustion chamber with sheet metal or the covers must be directly heated externally. In gas jets this action is still more unfavorable; here by the presence of the cylinder cover cooling heneath the ignition oint takes place, and thereby after burning takes place during the expansiomand, some cases, the exhaust stroke. cover in gas injections is so great, that even if the gas jet be first directed against the piston, and consequently only encounters the cover in the second or third place, after burning cannot be avoided.

In order to avoid after burning by the cooling of the gas flame jets in internalcombustion engines operated by gas, which work with injection of the gas or gaseous mixture from the inner deadpoint, recourse is had in this invention to a combination of an engine with lpistons working in opposite directions :and t e injection of one another. The to lowing advantages are thereby -obtained:-

1. The; as jetsxencountering one another in the mi dle of the cylinder are deflected against the pistons, that is to say, a inst surfaces which, as experience has s own, produce the least cooli and the surest the ot er hand, even maintenance of the com ustion.

2. The longer, the injection operation proceeds, the more the two pistons move away from the center of the flames, and therefore even the small cooling action of the pistons The action of the cooled cylinder as jets placed opposite opposite directions in the cylinder 0.

is further diminished, while with single pistons and lateral injection at places facing one another, the flame remains constantly m direct proximity" to the cooling cylinder cover.

A machine which'works according-to this method is shown in the accompanying drawings; a and b are the two pistons movin liln e gas or gaseous mixture is injected through the apertures f from the inner deadpoint (commencement of the working stroke). The flames meet one another in the flame center 9 and are then deflected against the two laterally separating pistons in eddies hand it, On the conclusion ofthe injection period the expansion takes lace, at the conclusion of which the expan ed gases of combustion escape through the apertures d and are scavenged by the air entering at e.

Instead of causing the machine to work in a two-stroke cycle, 1t may also work in fourstroke, thus instead of having the a ertures d and e, inlet and outlet valves coul be proscenes gas injection apertures f,

I declare that what I claim is 1. A gas operated internal combustion engine, comprising a cylinder with pistons working in opposite directions, and gas inlet ports at the inner dead point of the cylinder so arranged that the ignited fuel forms flames striking. against each other and the separating pistons.

In a gas operatedinternal combustion engine, means for preventing after burning of the ignited charge comprising gas inlet ports at the inner dead point of the cylinder so arranged that the ignited fuel forms flames striking against each other and the separating pistons.

In testimony whereof I have name to this specification in the two subscribing witnesses.

GEQRG SCHIMMING.

signed my Witnesses v HENRY HAsPnn, WOLDEMAR Hanna.

presence of v 

